mirror of
https://github.com/obsproject/obs-studio.git
synced 2024-07-02 09:33:33 +00:00
win-capture: Move NT functions to shared file
Having them declared statically in a header included by multiple compilation units results in duplicate functions being created.
This commit is contained in:
Richard Stanway
parent
2727dd96bd
commit
b2e30c955d
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@ -30,7 +30,8 @@ set(win-capture_SOURCES
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load-graphics-offsets.c
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game-capture-file-init.c
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duplicator-monitor-capture.c
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plugin-main.c)
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plugin-main.c
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nt-stuff.c)
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add_library(win-capture MODULE
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${win-capture_SOURCES}
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@ -4,7 +4,7 @@
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extern bool is_app(HANDLE process);
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extern wchar_t *get_app_sid(HANDLE process);
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extern HANDLE create_app_mutex(const wchar_t *sid, const wchar_t *name);
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extern HANDLE open_app_mutex(const wchar_t *sid, const wchar_t *name);
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extern HANDLE open_app_event(const wchar_t *sid, const wchar_t *name);
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extern HANDLE open_app_map(const wchar_t *sid, const wchar_t *name);
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HANDLE create_app_mutex(const wchar_t *sid, const wchar_t *name);
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HANDLE open_app_mutex(const wchar_t *sid, const wchar_t *name);
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HANDLE open_app_event(const wchar_t *sid, const wchar_t *name);
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HANDLE open_app_map(const wchar_t *sid, const wchar_t *name);
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242
plugins/win-capture/nt-stuff.c
Normal file
242
plugins/win-capture/nt-stuff.c
Normal file
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@ -0,0 +1,242 @@
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#include <windows.h>
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#include <winternl.h>
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#include <stdbool.h>
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#define THREAD_STATE_WAITING 5
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#define THREAD_WAIT_REASON_SUSPENDED 5
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typedef struct _OBS_SYSTEM_PROCESS_INFORMATION2 {
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ULONG NextEntryOffset;
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ULONG ThreadCount;
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BYTE Reserved1[48];
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PVOID Reserved2[3];
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HANDLE UniqueProcessId;
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PVOID Reserved3;
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ULONG HandleCount;
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BYTE Reserved4[4];
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PVOID Reserved5[11];
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SIZE_T PeakPagefileUsage;
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SIZE_T PrivatePageCount;
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LARGE_INTEGER Reserved6[6];
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} OBS_SYSTEM_PROCESS_INFORMATION2;
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typedef struct _OBS_SYSTEM_THREAD_INFORMATION {
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FILETIME KernelTime;
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FILETIME UserTime;
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FILETIME CreateTime;
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DWORD WaitTime;
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PVOID Address;
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HANDLE UniqueProcessId;
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HANDLE UniqueThreadId;
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DWORD Priority;
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DWORD BasePriority;
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DWORD ContextSwitches;
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DWORD ThreadState;
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DWORD WaitReason;
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DWORD Reserved1;
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} OBS_SYSTEM_THREAD_INFORMATION;
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#ifndef NT_SUCCESS
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#define NT_SUCCESS(status) ((NTSTATUS)(status) >= 0)
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#endif
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#define STATUS_INFO_LENGTH_MISMATCH ((NTSTATUS)0xC0000004L)
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#define init_named_attribs(o, name) \
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do { \
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(o)->Length = sizeof(*(o)); \
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(o)->ObjectName = name; \
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(o)->RootDirectory = NULL; \
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(o)->Attributes = 0; \
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(o)->SecurityDescriptor = NULL; \
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(o)->SecurityQualityOfService = NULL; \
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} while (false)
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typedef void(WINAPI *RTLINITUNICODESTRINGFUNC)(PCUNICODE_STRING pstr,
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const wchar_t *lpstrName);
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typedef NTSTATUS(WINAPI *NTOPENFUNC)(PHANDLE phandle, ACCESS_MASK access,
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POBJECT_ATTRIBUTES objattr);
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typedef NTSTATUS(WINAPI *NTCREATEMUTANT)(PHANDLE phandle, ACCESS_MASK access,
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POBJECT_ATTRIBUTES objattr,
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BOOLEAN isowner);
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typedef ULONG(WINAPI *RTLNTSTATUSTODOSERRORFUNC)(NTSTATUS status);
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typedef NTSTATUS(WINAPI *NTQUERYSYSTEMINFORMATIONFUNC)(SYSTEM_INFORMATION_CLASS,
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PVOID, ULONG, PULONG);
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FARPROC get_nt_func(const char *name)
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{
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static bool initialized = false;
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static HANDLE ntdll = NULL;
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if (!initialized) {
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ntdll = GetModuleHandleW(L"ntdll");
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initialized = true;
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}
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return GetProcAddress(ntdll, name);
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}
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void nt_set_last_error(NTSTATUS status)
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{
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static bool initialized = false;
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static RTLNTSTATUSTODOSERRORFUNC func = NULL;
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if (!initialized) {
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func = (RTLNTSTATUSTODOSERRORFUNC)get_nt_func(
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"RtlNtStatusToDosError");
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initialized = true;
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}
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if (func)
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SetLastError(func(status));
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}
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void rtl_init_str(UNICODE_STRING *unistr, const wchar_t *str)
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{
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static bool initialized = false;
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static RTLINITUNICODESTRINGFUNC func = NULL;
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if (!initialized) {
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func = (RTLINITUNICODESTRINGFUNC)get_nt_func(
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"RtlInitUnicodeString");
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initialized = true;
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}
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if (func)
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func(unistr, str);
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}
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#define MAKE_NT_OPEN_FUNC(func_name, nt_name, access) \
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HANDLE func_name(const wchar_t *name) \
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{ \
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static bool initialized = false; \
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static NTOPENFUNC open = NULL; \
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HANDLE handle; \
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NTSTATUS status; \
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UNICODE_STRING unistr; \
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OBJECT_ATTRIBUTES attr; \
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\
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if (!initialized) { \
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open = (NTOPENFUNC)get_nt_func(#nt_name); \
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initialized = true; \
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} \
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\
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if (!open) \
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return NULL; \
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\
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rtl_init_str(&unistr, name); \
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init_named_attribs(&attr, &unistr); \
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\
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status = open(&handle, access, &attr); \
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if (NT_SUCCESS(status)) \
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return handle; \
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nt_set_last_error(status); \
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return NULL; \
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}
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MAKE_NT_OPEN_FUNC(nt_open_mutex, NtOpenMutant, SYNCHRONIZE)
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MAKE_NT_OPEN_FUNC(nt_open_event, NtOpenEvent, EVENT_MODIFY_STATE | SYNCHRONIZE)
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MAKE_NT_OPEN_FUNC(nt_open_map, NtOpenSection, FILE_MAP_READ | FILE_MAP_WRITE)
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NTSTATUS nt_query_information(SYSTEM_INFORMATION_CLASS info_class, PVOID info,
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ULONG info_len, PULONG ret_len)
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{
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static bool initialized = false;
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static NTQUERYSYSTEMINFORMATIONFUNC func = NULL;
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if (!initialized) {
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func = (NTQUERYSYSTEMINFORMATIONFUNC)get_nt_func(
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"NtQuerySystemInformation");
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initialized = true;
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}
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if (func)
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return func(info_class, info, info_len, ret_len);
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return (NTSTATUS)-1;
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}
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bool thread_is_suspended(DWORD process_id, DWORD thread_id)
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{
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ULONG size = 4096;
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bool suspended = false;
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void *data = malloc(size);
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if (!data)
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return false;
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for (;;) {
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NTSTATUS stat = nt_query_information(SystemProcessInformation,
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data, size, &size);
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if (NT_SUCCESS(stat))
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break;
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if (stat != STATUS_INFO_LENGTH_MISMATCH) {
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goto fail;
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}
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free(data);
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size += 1024;
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data = malloc(size);
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if (!data)
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return false;
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}
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OBS_SYSTEM_PROCESS_INFORMATION2 *spi = data;
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for (;;) {
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if (spi->UniqueProcessId == (HANDLE)(DWORD_PTR)process_id) {
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break;
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}
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ULONG offset = spi->NextEntryOffset;
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if (!offset)
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goto fail;
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spi = (OBS_SYSTEM_PROCESS_INFORMATION2 *)((BYTE *)spi + offset);
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}
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OBS_SYSTEM_THREAD_INFORMATION *sti;
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OBS_SYSTEM_THREAD_INFORMATION *info = NULL;
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sti = (OBS_SYSTEM_THREAD_INFORMATION *)((BYTE *)spi + sizeof(*spi));
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for (ULONG i = 0; i < spi->ThreadCount; i++) {
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if (sti[i].UniqueThreadId == (HANDLE)(DWORD_PTR)thread_id) {
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info = &sti[i];
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break;
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}
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}
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if (info) {
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suspended = info->ThreadState == THREAD_STATE_WAITING &&
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info->WaitReason == THREAD_WAIT_REASON_SUSPENDED;
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}
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fail:
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free(data);
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return suspended;
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}
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HANDLE nt_create_mutex(const wchar_t *name)
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{
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static bool initialized = false;
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static NTCREATEMUTANT create = NULL;
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HANDLE handle;
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NTSTATUS status;
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UNICODE_STRING unistr;
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OBJECT_ATTRIBUTES attr;
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if (!initialized) {
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create = (NTCREATEMUTANT)get_nt_func("NtCreateMutant");
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initialized = true;
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}
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if (!create)
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return NULL;
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rtl_init_str(&unistr, name);
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init_named_attribs(&attr, &unistr);
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status = create(&handle, SYNCHRONIZE, &attr, FALSE);
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if (NT_SUCCESS(status))
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return handle;
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nt_set_last_error(status);
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return NULL;
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}
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@ -1,238 +1,7 @@
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#pragma once
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#include <winternl.h>
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#define THREAD_STATE_WAITING 5
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#define THREAD_WAIT_REASON_SUSPENDED 5
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typedef struct _OBS_SYSTEM_PROCESS_INFORMATION2 {
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ULONG NextEntryOffset;
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ULONG ThreadCount;
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BYTE Reserved1[48];
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PVOID Reserved2[3];
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HANDLE UniqueProcessId;
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PVOID Reserved3;
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ULONG HandleCount;
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BYTE Reserved4[4];
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PVOID Reserved5[11];
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SIZE_T PeakPagefileUsage;
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SIZE_T PrivatePageCount;
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LARGE_INTEGER Reserved6[6];
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} OBS_SYSTEM_PROCESS_INFORMATION2;
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typedef struct _OBS_SYSTEM_THREAD_INFORMATION {
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FILETIME KernelTime;
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FILETIME UserTime;
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FILETIME CreateTime;
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DWORD WaitTime;
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PVOID Address;
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HANDLE UniqueProcessId;
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HANDLE UniqueThreadId;
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DWORD Priority;
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DWORD BasePriority;
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DWORD ContextSwitches;
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DWORD ThreadState;
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DWORD WaitReason;
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DWORD Reserved1;
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} OBS_SYSTEM_THREAD_INFORMATION;
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#ifndef NT_SUCCESS
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#define NT_SUCCESS(status) ((NTSTATUS)(status) >= 0)
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#endif
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#define STATUS_INFO_LENGTH_MISMATCH ((NTSTATUS)0xC0000004L)
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#define init_named_attribs(o, name) \
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do { \
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(o)->Length = sizeof(*(o)); \
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(o)->ObjectName = name; \
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(o)->RootDirectory = NULL; \
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(o)->Attributes = 0; \
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(o)->SecurityDescriptor = NULL; \
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(o)->SecurityQualityOfService = NULL; \
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} while (false)
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typedef void(WINAPI *RTLINITUNICODESTRINGFUNC)(PCUNICODE_STRING pstr,
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const wchar_t *lpstrName);
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typedef NTSTATUS(WINAPI *NTOPENFUNC)(PHANDLE phandle, ACCESS_MASK access,
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POBJECT_ATTRIBUTES objattr);
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typedef NTSTATUS(WINAPI *NTCREATEMUTANT)(PHANDLE phandle, ACCESS_MASK access,
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POBJECT_ATTRIBUTES objattr,
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BOOLEAN isowner);
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typedef ULONG(WINAPI *RTLNTSTATUSTODOSERRORFUNC)(NTSTATUS status);
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typedef NTSTATUS(WINAPI *NTQUERYSYSTEMINFORMATIONFUNC)(SYSTEM_INFORMATION_CLASS,
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PVOID, ULONG, PULONG);
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static FARPROC get_nt_func(const char *name)
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{
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static bool initialized = false;
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static HANDLE ntdll = NULL;
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if (!initialized) {
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ntdll = GetModuleHandleW(L"ntdll");
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initialized = true;
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}
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return GetProcAddress(ntdll, name);
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}
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static void nt_set_last_error(NTSTATUS status)
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{
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static bool initialized = false;
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static RTLNTSTATUSTODOSERRORFUNC func = NULL;
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if (!initialized) {
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func = (RTLNTSTATUSTODOSERRORFUNC)get_nt_func(
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"RtlNtStatusToDosError");
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initialized = true;
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}
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if (func)
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SetLastError(func(status));
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}
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static void rtl_init_str(UNICODE_STRING *unistr, const wchar_t *str)
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{
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static bool initialized = false;
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static RTLINITUNICODESTRINGFUNC func = NULL;
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if (!initialized) {
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func = (RTLINITUNICODESTRINGFUNC)get_nt_func(
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"RtlInitUnicodeString");
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initialized = true;
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}
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if (func)
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func(unistr, str);
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}
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static NTSTATUS nt_query_information(SYSTEM_INFORMATION_CLASS info_class,
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PVOID info, ULONG info_len, PULONG ret_len)
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{
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static bool initialized = false;
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static NTQUERYSYSTEMINFORMATIONFUNC func = NULL;
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if (!initialized) {
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func = (NTQUERYSYSTEMINFORMATIONFUNC)get_nt_func(
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"NtQuerySystemInformation");
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initialized = true;
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}
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if (func)
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return func(info_class, info, info_len, ret_len);
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return (NTSTATUS)-1;
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}
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static bool thread_is_suspended(DWORD process_id, DWORD thread_id)
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{
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ULONG size = 4096;
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bool suspended = false;
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void *data = malloc(size);
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for (;;) {
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NTSTATUS stat = nt_query_information(SystemProcessInformation,
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data, size, &size);
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if (NT_SUCCESS(stat))
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break;
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if (stat != STATUS_INFO_LENGTH_MISMATCH) {
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goto fail;
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}
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free(data);
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size += 1024;
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data = malloc(size);
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}
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OBS_SYSTEM_PROCESS_INFORMATION2 *spi = data;
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for (;;) {
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if (spi->UniqueProcessId == (HANDLE)(DWORD_PTR)process_id) {
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break;
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}
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ULONG offset = spi->NextEntryOffset;
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if (!offset)
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goto fail;
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spi = (OBS_SYSTEM_PROCESS_INFORMATION2 *)((BYTE *)spi + offset);
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}
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OBS_SYSTEM_THREAD_INFORMATION *sti;
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OBS_SYSTEM_THREAD_INFORMATION *info = NULL;
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sti = (OBS_SYSTEM_THREAD_INFORMATION *)((BYTE *)spi + sizeof(*spi));
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for (ULONG i = 0; i < spi->ThreadCount; i++) {
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if (sti[i].UniqueThreadId == (HANDLE)(DWORD_PTR)thread_id) {
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info = &sti[i];
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break;
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}
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}
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if (info) {
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suspended = info->ThreadState == THREAD_STATE_WAITING &&
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info->WaitReason == THREAD_WAIT_REASON_SUSPENDED;
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}
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fail:
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free(data);
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return suspended;
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}
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#define MAKE_NT_OPEN_FUNC(func_name, nt_name, access) \
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static HANDLE func_name(const wchar_t *name) \
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{ \
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static bool initialized = false; \
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static NTOPENFUNC open = NULL; \
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HANDLE handle; \
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NTSTATUS status; \
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UNICODE_STRING unistr; \
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OBJECT_ATTRIBUTES attr; \
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\
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if (!initialized) { \
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open = (NTOPENFUNC)get_nt_func(#nt_name); \
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initialized = true; \
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} \
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\
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if (!open) \
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return NULL; \
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\
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rtl_init_str(&unistr, name); \
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init_named_attribs(&attr, &unistr); \
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\
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status = open(&handle, access, &attr); \
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if (NT_SUCCESS(status)) \
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return handle; \
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nt_set_last_error(status); \
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return NULL; \
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}
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MAKE_NT_OPEN_FUNC(nt_open_mutex, NtOpenMutant, SYNCHRONIZE)
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MAKE_NT_OPEN_FUNC(nt_open_event, NtOpenEvent, EVENT_MODIFY_STATE | SYNCHRONIZE)
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MAKE_NT_OPEN_FUNC(nt_open_map, NtOpenSection, FILE_MAP_READ | FILE_MAP_WRITE)
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|
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static HANDLE nt_create_mutex(const wchar_t *name)
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{
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static bool initialized = false;
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static NTCREATEMUTANT create = NULL;
|
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HANDLE handle;
|
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NTSTATUS status;
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UNICODE_STRING unistr;
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OBJECT_ATTRIBUTES attr;
|
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|
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if (!initialized) {
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create = (NTCREATEMUTANT)get_nt_func("NtCreateMutant");
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initialized = true;
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}
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|
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if (!create)
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return NULL;
|
||||
|
||||
rtl_init_str(&unistr, name);
|
||||
init_named_attribs(&attr, &unistr);
|
||||
|
||||
status = create(&handle, SYNCHRONIZE, &attr, FALSE);
|
||||
if (NT_SUCCESS(status))
|
||||
return handle;
|
||||
nt_set_last_error(status);
|
||||
return NULL;
|
||||
}
|
||||
bool thread_is_suspended(DWORD process_id, DWORD thread_id);
|
||||
HANDLE nt_create_mutex(const wchar_t *name);
|
||||
HANDLE nt_open_mutex(const wchar_t *name);
|
||||
HANDLE nt_open_event(const wchar_t *name);
|
||||
HANDLE nt_open_map(const wchar_t *name);
|
||||
|
|
|
|||
Loading…
Reference in a new issue